Dipper is a Mage of Light. He uses information to guide his actions help him propel forward, with little regard for building a larger view or greater context for the information that he has, but still wanting to illuminate and understand the secrets that lie in Gravity Falls.
Mable on the other hand is very underdeveloped Maid of Heart. She draws strength from herself, and continuous builds herself up for more power and more positivity, as well as doing so for most of the other characters (helping Stan go after Lazy Susan, giving Candy and Grenda the confidence to be who they are), etc. Granted she oftentimes spirals OUT OF CONTROL (look at the Boy Band episode).

